Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::vm.brk - Fires when a brk is requested (i.e. the heap will be resized)
SYNOPSIS
vm.brk
VALUES
address
the requested address
name
name of the probe point
length
the length of the memory segment
CONTEXT
The process calling brk.
SystemTap Tapset Reference March 2016 PROBE::VM.BRK(3stap)